Yes, It can turn the crystal black and permanently damage it.
A finger print is the oils from your finger being left on something you have touched (not including food) like glass and things like that. If fire or heat gets close to the finger print the oils can evaporate leaving no traces of them. hope this helps!
stick your finger down you're trout and barf it out
Fingerprints stay on a surface due to the natural oils and sweat present on the skin. When a finger touches a surface, these oils and sweat are transferred, leaving a visible print. The ridges and patterns on the skin create a unique impression that can be used for identification.
Sebum Its the natural oils that your skin uses to keep it healthy.
So that you don't put finger prints or body oils over the slide.
It can burn or bleach out the healthy oils and minerals of the hair!
Engine overheating can put extreme stress on many parts, burn oils and greases, warp cylinder heads and stress radiators.
In aromatherapy, "Stress" is one of the most commonly treated problems. The most commonly used and readily available oils for stress are: Bergamot, Clary Sage, Geranium, Jasmine, Lavender, Neroli, Rose, and Ylang Ylang. Remember that most essential oils should not be used undiluted, and you should always do a patch test for sensitivity. An allergic reaction will only add to your stress levels.
A microscope slide should be held by its edges to avoid leaving fingerprints or oils from the skin on the slide surface, which can interfere with the clarity of the image under the microscope. Handling the slide by its edges also helps prevent accidental damage or smudging of the sample on the slide.
Oils on your hand reduce the surface tension causing the bubbles to pop
not enough surface to leave your finger oils on, like trying to leave a shoe print on gravel
It is generally not recommended that you put essential oils directly into any household appliance. Even properly diluted, some essential oils--lavender and eucalyptus, for example--have solvent properties and will damage plastic and other surfaces.